Distribution and Ecology - Prostrate in brejo, the stems threading through grasses and sedges but not adventitiously rooting, known only from the type-locality, at ± 1100 m on the Tocantins slope of Sa. Geral do Paranã near 14°30'S in e.-centr. Goiás, Brazil.—Fl. II- III(-?).

Discussion:

In habit M. pratincola resembles humifuse forms of M. gracilis sensu lato but differs from all of them in essentially sessile leaves, the first pair of pinnae arising directly beyond the leaf-pulvinus. The form of M. gracilis most common in east-central Goiás is var. invisiformis, found not in brejo but in campo rupestre and dry cerrado habitats, and this differs further from M. pratincola in at least thinly aculeolate stems and in pilosulous stems and flowers. The type-population of M. pratincola was taken from saturated sandy-clay soil of brejo, where it formed extensive carpets of interlacing humifuse stems.